Materiales de Construcción, Vol 56, No 281 (2006)

Effect of asphaltene and resin oils on the viscosity of bituminous petroleum materials to be used as asphalt primers


https://doi.org/10.3989/mc.2006.v56.i281.91

G. Márquez
Dpto. Construcciones Arquitectónicas II, Univ. de Sevilla, Spain

F. J. Alejandre
Dpto. Construcciones Arquitectónicas II, Univ. de Sevilla, Spain

M. R. Bencomo
Facultad de Ciencias. Escuela de Química. Universidad Central de Venezuela, Venezuela, Bolivarian Republic of

Abstract


The bituminous crude from the Machete, Venezuela, area, which has such a fluid consistency that it falls outside the normal scope of the A5TM D-5 (1) penetration test exceeding the 3D-mm ceiling specified in that standard and can be used as an asphalt primer: Like other asphalt products, these materials are -chemically speaking- a mix of numerous naphthenic, paraffinic and aromatic hydrocarbons and heterocyclic compounds containing sulphur, nitrogen, oxygen and so on. They have a dense and a malthene oil phase which, along with the natural hydrocarbons additives used in these products acts as a volatile fluidizer. The former is described as a mix of asphaltenes: complex high molecular weight substances that are insoluble in paraffinic hydrocarbons and soluble in aromatic compounds such as benzene. The malthene oil phase, in turn, consists in a mix of resins and hydrocarbons and together the two constitute a colloidal system. The experiments discussed in the present paper were conducted to determine the effect of the proportion of asphaltenes and resin oils on the viscosity of such bituminous crude emulsions/ with a view to their use as primers. These experiments were run in a Parr batch reactor in a nitrogen atmosphere using n-heptane as a solvent. The resins were separated after the asphaltenes precipitated from the samples and subsequently from the malthene fraction obtained. The results showed that the asphaltenes account for the structural characteristics and consistency of the medium and the resin oils for its cohesive properties/,the malthene oils act as solvents.

Keywords


asphalt primers; bituminous crude oil; asphaltenes; resins; viscosity

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References


(1) ASTM 0-5, Standard method test for penetration of bitominous materials, ASTM Book of Standards. Philadelphia, 1997.

(2) NBE QB-90, Norma Básica de la Edificación, Cubiertas con materiales bituminosos, 1990.

(3) AENOR, Norma UNE 104-234, modificada en 1995, Impermeabilización. Materiales bituminosos y bituminosos modificados. Pinturas bituminosas de imprimación, 1992.

(4) The Asphalt Institute, Materiales asfálticos, mezclas, construcción y calidad, pp. 22-30, 40-73, 37-40, Productos Asfálticos S. A., Madrid, 1985.

(5) W. L. Nelson, G. Thery, O. Noriega, Petróleos crudos de Venezuela y otros países p. 9, Ed. Ministerio de Minas e Hidrocarburos, Caracas, 1959.

(6) ASTM 0-2171, Standard method test for viscosity ofasphalts by vacuum capillary viscometer, ASTM Book of Standards, Philadelphia, 1995.

(7) The Asphalt institute, Manual del Asfalto, pp. 18-26, 70-82, 146-148, 271-284. Productos Asfálticos S. A. Madrid, 1962.

(8) R. B. Long, The concept of asphaltenes, pp. 53-60, American Chemical Society Editions. Washington O.C., 1981.

(9) J. P. Pfeiffer, R. N. Saal, «Asphaltic bitumen as colloid system», J. Phys. Chem., nº 44 (1949), pp. 139-149.

(10) M. Tojima, S. 5uhara, M. Imamura, A. Furuta, «Chemistry of asphaltenes: some aspects», Catalog. Today, nº 43 (1998), pp. 347-351.

(11) B. Nielsen, Effects ofthe temperature and pressure on asphatene palticle size distribution in crude oils diluted with n-pentane, pp. 1- 9, University of Calgary Edit. Calgary, 1994.

(12) J. G. Speight, S. E. Moschopedis, Chemistry of asphaltenes.: advances in chemistry series, p. 195, M. Joan Comstock Edit., Washington O. C., 1981.

(13) ASTM 0-3279, Standard test method for n-heptane insolubles, ASTM Book of Standards, Philadelphia, 1997.

(14) J. G. Speight, The chemistry and technology ofpetroleum, pp. 23-29, Marcel Oekker Edit. New York., 1998.

(15) ASTM 0-2041, Standard method test for specific gravity of bituminous mixtures. ASTM Book of 5tandards, Philadelphia, 1995.

(16) J. Mewis, «Thixotrophy, a general review», Journal of Non-newtonian Fluid Mechananics, n° 6 (1979), pp. 1-20.

(17) A. W. Adamsom, «The difussional behavior and viscosity of liquid mixtures», Soco Pet Eng., nº 219 (1963), pp. 148-158.

(18) M. Bouldin, A. Collins, The Rheology and micro-structure of polymer asphalt blends, pp. 2-8, American Chemical Society Edit., Washington O.C., 1990.

(19) J. G. Speight, S. Moschopedis, On the Molecular Nature of Petroleum Asphaltenes, pp. 10-17, American Chemical Society Edit., Washington O.C., 1981.

(20) J. Roussel, R. Boulet, Composition of crude oils and petroleum products. Characterization of crude oils and petroleum fractions: Petroleum Refinig, Vol. 1 (1995), pp. 1-84, Editions Technip, Paris.

(21) T F: Yen, G. V. Chilingarian, Asphaltenes and asphalts: development in petroleum science, Elsevier Edit., Paris, 1994.

(22) V. León, «Nuevos enfoques sobre la visión molecular de un crudo pesado», Rev. Visión Tecnológica, Vol. 2, n° 5 (1998), pp. 131-138.

(23) A. Layrisse, E. González, F. Chirinos. Composición y características fisicoquímicas de crudos extrapesados. Revista Técnica INTEVEP, Vol. 1, n° 4 (1984), pp. 3-18.

(24) J. W. Goodwin. Colloid dispersions (1982), pp. 165-195. Royal Society Chemistry Edit. London.

(25) R. J. Hunter. Foundations of collid Sciences, Vol. 1 (1987), pp. 564-625. Oxford Sciences Publishing. Oxford.




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